Monthly Climate Summary for  April  2006  at Hampstead  
                        home daily
                              Cold until the 11th, then moderately warm; generally dry   back forward
                       
Overall mean temperature was 9.3 ºC which is +0.9 degC compared with the 1971-2000 average
Mean day maximum (09-21) was 13.2 ºC              
Mean night minimum (21-09) was 5.3 ºC              
Mean 24hr maximum (09-09) was 13.3 ºC which is +0.9 degC compared with the 1971-2000 average
Mean 24hr minimum (09-09) was 5.3 ºC which is +0.9 degC compared with the 1971-2000 average
  Highest day max was 17.4 ºC on  the   22          
  Lowest day max was 7.8 ºC on  the 11          
  Highest night min was 9.9 ºC on  the 27          
  Lowest night min was -1.5 ºC on  the 5          
  Lowest grass min was -4.4 ºC on  the 6          
                       
Total rainfall this month was 41.1 mm which is 73.5 per  cent of the 1971-2000 average  
  Highest daily fall was 13.2 mm on  the 30          
Number of hours with rain was 61.0 hrs              
Equiv. TSR rainfall duration was 42.7 hrs which is 101.7 per  cent of the 1971-2000 average  
  Highest no of wet hrs 11.0 hrs on  the 9          
  Highest equiv duration 9.1 hrs on  the 9          
                       
Total sunshine this month was 129.8 hrs which is 101.5 per  cent of the 1971-2000 average  
Equiv. C/S sunshine total was 142.7 hrs which is 101.5 per  cent of the 1971-2000 average  
  Highest daily sun was 10.5 hrs on  the 5          
                       
Maximum  snow depth  was 0.0 cm              
                       
Mean sea-level pressure at 09Z 1016.3 mbar which is +1.1 mbar compared with the 1961-1990 average
  Highest pressure at 09Z 1027.3 mbar on  the 28          
  Lowest  pressure at 09Z 1005.7 mbar on  the 1          
                       
Number of days with:                    
Air Frost 2   0.2mm rain 15   No  sun 1   Snow lying 0  
Grnd Frost 9   1.0mm 9   3h  sun 19   Snow/sleet 2  
Max < 0ºC 0   5mm 3   6h  sun 8   Hail 0  
Max > 10 27   10mm 1   9h  sun 3   Thunder 0  
Max > 20 0   25mm 0   12h sun 0   Fog at 09Z 1  
Max > 30 0         15h sun 0   Gale 0  
                       
Notable events during the month:                 
No maximum above 18°C before end-April for first time since 1992      
Sleet and wet snow fell heavily late on the 9th and very early on the 10th, leaving a temporary slushy cover